A method is provided for producing a foil made of an electrically conductive material. The foil consists of the same electrically conductive material along the extension of the foil thickness. A flexible substrate is first introduced into a working chamber; a layer made of the electrically conductive material is deposited on at least one surface region of the flexible substrate using a vacuum coating process; and the first layer is then removed from the flexible substrate. Either an ion-etching process is carried out at least on the surface region of the flexible substrate prior to depositing the layer made of the electrically conductive material and/or the layer made of the electrically conductive material is heated during and/or after the layer is deposited.